Driving means in embroidery machines



March 17, 1936. sc 2,034,598

DRIVING MEANS IN EMBROIDERY MACHINES Filed May 25, 1934 5 Sheets-Sheet 1 -March 17, 1936. I SCHE|BEL I 2,034,598

DRIVING MEANS IN EMBROIDERY MACHINES Filed May 25, 1954 5 Sheets-Sheet 2 March 17, 1936. K. s. SCHEIBEL 2,034,598

DRIVING MEANS IN EMBROIDERY MACHINES Filed May 25, 1934 5 Sheets-Sheet 5 ZDFT 6. Lib/7295,54

Sum/M44 March 17, 1936. SCHElBEL DRIVING MEANS IN EMBROIDERY MACHINES Filed May 25, 1954 5 Sheets-Sheet 4 /mwm 77 a4 4 imam, fp/mm'fi March 17, 1936. K. G. SCHEIBEL DRIVING MEANS IN EMBROIDERY MACHINES Filed May 25, 1954 5 Sheets-Sheet 5 Patented Mar. 17, 1936 UNETEQ STATES DRIVING IVIEAN S IN EMBROIDERY MACHINES Kurt Gustav Scheibel, Signor to Wurker G.

many

Dresden, Germany, asm. b. H., Dresden, Ger- Application May 25, 1934, Serial No. 727,561 In Germany June 3, 1933 19 Claims.

The present invention relates to an embroidery automatic machine such as forms the subject of prior application of A. A. Bohmann and K. G. Scheibel, Ser. No. 710,360, filed February 8th, 1934.

As is known in such arrangements the needle plates are displaced by the jacquard card and thereby interponents are influenced which finally transmit their adjustment to the rack bars which adjust the embroidery frame. The interponents must be moved. Such movement has been efiected from the driving mechanism of the machine. The movements of the interponents are comparatively complicated and must be carried out extremely exactly. For the production of these movements a cam drive has been utilized. The pin or follower running in a closed cam track can be positively exactly controlled and the cam can be formed exactly as required. In order to increase the output of such embroidery machines it is usual to combine a large number of needles and corresponding embroidery frames in a single aggregate, as a result of which, constructions which are inconvenient and are very expensive are obtained.

As distinguished therefrom the present invention provides another method of increasing the output of such embroidery machines, namely the method otherwise usual in the art of increasing speed. The application of this method to embroidery machines was hitherto impossible because the cam guide in the transmission of movement prevented a high speed of rotation. The pins or followers running in the cams are pressed according to the construction of the interponents to be moved first against the outer wall of the cam and then against the inner cam surface. As the result of rapid rotation such Wear occurs that a change from the hitherto usual speed of rotation, (about 250 revolutions per minute) to high speeds of rotation (about 590 revolutions per minute) is impossible. On the other hand the positive cam drive is particularly adapted to control the complicated motions of the interponents whereas other driving mechanism such as for example lever drives or the like in consequence of the masses to be moved are quite unsuitable and also permit no separate control.

As distinguished therefrom the present invention resides in this that the motions of the intermediate members or interponents are trans mitted from the coupling point of a crank link polygon.

In such a drive the members transmitting the movements are connected with one another sim- 55. ply by pivot pins or the like which can be mounted solid and which at the most must be moved in straight guides so that even in the high speeds in question in automatic embroidery machines which are limited to a certain extent by the frame movement a continuously exact guide may be maintained, the wear of the transmitting and moving means being kept throughout within normal limits. The masses to be moved may be kept very small and nevertheless a considerable stability imparted to the parts acting as bearings or comparatively large bearing surfaces may be provided so that heavy loads can be taken up by the moving rods. In particular the use of this form of drive in embroidery machines is very convenient because in consequence of the movement of small masses stoppage can be effected quite suddenly. The transmission of movement by this form of drive which is known in the art permits several interponents to be moved from one and the same coupling point since their different typesof movement requirements can be obtained by selection of a number of cams derived from the coupling point. This is particularly important in embroidery machines because in suchmachines quite a number of intermediate members have to move in quite different ways, the separate movements bearing a definite time relation to one another. This can all be obtained by corresponding careful selection of the cams in question, the drive being considerably simplified so that one and the same coupling point can be used for the movement of several intermediate members.

For the movement of these members it is moreover of importance that they should remain stationary for certain times which do not correspond with the times of natural reversal in crank and connecting rod gearing. For example in order to contact the needle plates the movement of the feeler member, the reciprocation of which can take place in a shorter time than the half crank pin angular movement (180) is necessary. As the plates will be engaged if possible at the beginning of the position of rest in order to avoid damage and the reciprocating movement of the feelers can only correspond with the end positions of the crank pin movement, the problem is to interpose a pause in the interval between the two dead point positions of the crank pin carrier. These and such problems can be solved by the drive of the present invention by selecting a stoppage of the transmission at a suitable moment between the two reversal points of the crank pin drive by suitable selection of a cam groove and the corresponding displacement particularly intended for a construction such as shown in the prior application No. 710,360 above mentioned; the drive is illustrated in conjunction with this construction in one embodiment of the accompanying drawings.

Fig. 1 shows a vertical transverse section through the device.

Fig. 2 is a vertical longitudinal section on the line IIII of Fig. 1.

Fig. 2a is a detail showing a modification.

Fig. 3 is a vertical longitudinal section on the line I1IIII of Fig. 1.

Fig. 4 is a vertical longitudinal section on the line IVIV of Fig. 1.

Fig. 5 is a part of Fig. 3 to enlarged scale.

Fig. 6 is a vertical transverse section on the line VIVI of Fig. 5.

Fig. 7 is a diagrammatic illustration of the drive employed.

The two automatic casings are indicated by A and B as in the said prior application. In the casing A is mounted at I and 2 the shaft 3 which in order that the parts behind it will be visible is partly broken away. In the part broken away the shaft is indicated in dotted lines. On the shaft 3 is mounted the bevel pinion 4 which meshes with a bevel pinion 5. The bevel pinion 5 is mounted on the main driving shaft I which appears also in the said prior application. On the shaft 3 is mounted the eccentric disc 8 which is surrounded by the eye 9' formed as a bearing of the coupling rod 9. The coupling rod 9 is connected by the pivot I0 to a guide member I I which is movable in an arcuate guide I2. It should be noted that the guide block II and the arcuate guide I2 may be replaced by a link I3 as in Fig. 2a, the pivot I4 of which would be positioned at the point where the centre of ourvature of the arcuate guide I2 would be if the guide I2 were used.

The two links I6 and I! are connected to the coupling rod 9 by means of the pivot I5. The link I 6 is connected at the other end with a pivot I8 which is provided on the lever 20 mounted in bearings at I9. To the pivot I8 is also connected the link 2|, the other end of which is connected with the lever 23 by the pivot 22. The lever 23 forms the horizontal arm of a frame 24 shown in Fig. 1 which is adapted to swing by means of the pivots 25 and 26 in the housing in the direction of the arrow indicated in Fig. 2. The upper end of the frame forms a cross bar by means of which the plates are always returned to the initial position after they have been contacted.

The link I1 is connected by means of the pivot 2'! to the lever 29 mounted at 28 in the casing A. To this lever is pivoted at 39 the connecting rod 3| which is connected by the pivots 32 and 33 with the two U-shaped bails 34, 35. The U-shaped bails 34, 35 are mounted in the housing at 34, 35' and carry the spindles 39 for the T-shaped levers 31, 37' or 38, 38' Which are indicated by the same reference numerals in the said prior application. The mode of operation of the gearing connected with the levers 31 is already described in the earlier application and it does not form the subject of the present application. Only the rods 5|, 5|, 5|", 5I"' and 52, 52', 52", 52", which are connected with the carriages 53 carrying the switch need be mentioned. These carriages are as has been already explained in said prior application mounted so as to be vertically movable in the housing B. On the carriages 53 are mounted the slides 59 to which the rack bars 6| are pivoted. The rack bars 6| cooperate through the pinions 68 with the rack bars I III which move the embroidery frame movably mounted on the table I02.

The carriages are driven from the shaft 49 mounted in the housing B which shaft is driven by an intermediate gearing (not shown) from the main driving shaft I. On the shaft 49 is mounted an eccentric disc 4| which is embraced by the eye 42' of the intermediate member 42 formed as a coupling rod. The double armed lever 44 is connected at 43 to the coupling rod, said lever being pivoted at 45 in the housing B. The free end of the lever 44 is connected by the link 46 with the carriage 53. From this coupling 42 serving as a connecting rod the rack bars BI and the locking pawl 69 are operated. For this purpose the link II is connected to the coupling rod 42 at I0, being connected at the other end by the pivot I2 with a cam block I3. The cam block is guided in a cam track I5 provided on the wall I4 of the frame. To the pivot I8 is secured is also'mounted an arm 89 which K with a pin 8| engages in a slot 6| of the rack bar 6|. I

The card cylinder I96 over which the jacquard I58 is guided will be explained with reference to the Figs. 2-6. The spindle I96 of the card cylinder is mounted in a bearing member I4! which is movable on the slide bar I49 mounted on the machine frame. The plate I49 (Fig. 5) is mounted on the free end I I5" of the bell crank lever I I5 which plate embraces with a corresponding eye the disc I50. The disc I59 also embraces with an eccentric opening the spindle I99 of the card cylinder I96. Moreover there is secured to the disc I50 hand lever I5I. In the position shown in Fig. 5 the lever I5I is pressed against a pin I55 secured on the plate I49 and thereby determines the end position of the disc I59 or of the hand lever I5I. If the lever |5I is swung to the right in the direction of the arrow shown in Fig. 5 then after overcoming the dead point position the hand lever I5| bears against the stop pin I55 provided on the plate I49. At the same time however the spindle I 06 of the card cylinder I is so displaced relative to the plate I49 that the pins I95" of the card cylinder I35 come into engagement with the jacquard card I58 held in the guides I51 (see the full line position Fig. 3 and the dotted line position Fig. 5).

By this arrangement it is possible without having to release in any way the rods of the card cylinder I96 to push back the card cylinder for the purpose of changing the cards from the card guide I51 and bring it back into position.

The card cylinder I96 is driven by means of a worm I59 which meshes with a worm wheel I59 rigidly mounted on the cylinder spindle I95. The worm I59 is mounted on the spindle I SI which runs at one end in bearing I62 in the housing A and at the other in the downwardly projecting bracket I41 of the movable bearing mem- I41 for the spindle I6I.

ber I41. A slot I63 is provided on the bracket In order to ensure that the worm I59 is always in engagement without play with the worm wheel I68 the spindle I6I is pressed upwards resiliently by the spring bolts I64. A collar I65 on the spindle I6I ensures. that the spindle I6I is connected so as to be axially movable with the bracket I41.

On the spindle I6I is mounted the pinion I66 with winch the rack bar I61 cooperates. The rack bar I61 is guided so as to be vertically movable in the bearings I68. On the lower end of the rack bar shaft I61 is provided a bolt I69 which is embraced by the forked end I16 of a lever I16. The lever I16 is adapted to swing about the pivot I1! on the housing A and is provided with a slide guide I12 in which the eccentric disc I13 formed as a three-sided arc engages. The eccentric disc I13 is secured to the driving shaft 3 indicated in Fig. 1.

On the spindle I6I is also mounted an arm I15 which is provided with the locking bolt I16. This locking bolt cooperates with a locking disc I11 provided on the machine frame which is provided with one or more holes I18 corresponding to the locking bolt I16.

As the arc I13 of the arcuate cam is curved about the axis of the shaft 3 the lever I16 and the rack bar I61 connected therewith remains at.

rest as long as the corresponding arcuate member I13 remains in engagement with the slide member [12. During this time the pinion I66 is moved so far out of the plane of the rack bar I61, dotted position in Fig. 4, that the rack bar I61 is out of engagement with the pinion I 66. During this time the pin I16 is located in one of the openings I18 of the locking plate I11 so that the spindle I6! is held against rotation. Before the end point of the cam portion I13 meets the slide portion 112 the lever H5 is turned in a manner later to be described, in the direction of the arrow indicated in Fig. 4 and thereby the card cylinder I66 is brought with the card guide I51 into the position shown in Fig. 4. At the same time however the bearing member I41 is alsocorrespondingly moved to the right in the direction shown in Fig. 4 so that the spindle I6I reaches such a position that the pinion I66 is in mesh with the rack bar I61 and the pin I16 comes out of engagement with the opening I18, (full line position in Fig. 4). The pinion 56 mounted on the spindle I BI is thus now coupled with the rack bar I61 so that in turning the lever I16 upwards a rotation of the spindle l6I and corresponding rotation of the card cylinder !66 takes place in the direction of the arrow indicated in Fig. 4. As soon as the lever I16 has reached its upper dead point position, the lever I I5 is again swung back. The card cylinder I66 is thereby moved with the card guide I51 to the plate needles 266 (see dotted position in Fig. 4), and at the same time the spindle I6I is axially displaced so that the pinion I66 comes out of engagement with the rack bar I61 and the pin I16 comes into engagement with the hole I18 of the locking disc I11. As the lever I18 in its upper dead point position also remains during about 60 angular rotation of the disc I13 in the position of rest, enough time is available for carrying out this operation.

During the succeeding downward movement of the swinging lever I16 the rack bar I61 remains out of engagement with the pinion I66 because the card cylinder I66 still remains held in position shown in Fig. 8. Only when the cam portion H3 again contacts with the lower slide guide member I12 is the lever II5 again swung in the direction of the arrow in Fig. 3 as the result of which the card cylinder I66 and the parts con nected therewith are again moved to the right so that the pinion I66 again comes into engagement with the rack bar I61. The operation can then be repeated.

The bell crank lever I I5 is actuated also by the coupling member 9. For this purpose there is provided on the coupling rod 9 a bracket 9 to a pivot 82 on which the link 83 is connected, which link is connected by a pivot 84 with a further link 85. The link 85 is mounted to swing at 86 in the housing. To the link pivot 84 is connected also the link bar 81 which is connected to the free end of the bell crank lever II5 by the pivot 88. The couple drive actuating the contacting rods for the needle plates, the needle plate return device 24 and the jacquard card cylinder mounting control mechanism is illustrated diagrammatically in Fig. '1 in which all the auxiliary mechanism has been omitted. The eccentric disc is shown as'a crank 8 which is mounted on the spindle 3. To the coupling rod 9 which is pivotally connected at I6 with the rocking member I3 pivoted at I4 is connected by means of the bracket 6" (shown in Fig. 3) a pivot 82 which during rotation of the crank 8 describes the curve indicated as a in dotted lines in Fig. '1. The link 83 is so arranged that while the pivot 82 moves on the cam portion curved to the arc b the pivot 84 remains stationary. This means however that the rods 81, 88, H5 connected with the pivot 84 are also stationary.

The pivot I5 also provided on the coupling rod 8 during the rotation of the crank 8 describes the curve indicated by c in Fig. '1. The link I6 connected to the pivot I5 is now so arranged that while the pivot moves through the cam portion shaped to the are d the point I8 is stationary. This also involves stoppage of the driving members 26-24 connected with the point I6.

To the pivot I5 is connected also the links H which is so arranged that while the point I5 traverses the cam portion shaped to the are e the pivot 21 is stationary. As a consequence the driving members 29, 3I connected with the pivot remain stationary during the corresponding time.

With reference to the coupling point I5 it is interesting that from it two different movements are initiated since two cam portions are used of the curve described by the point I5 and to these cam portions are provided correspondingly mounted links. As regards the drive initiated from the coupling member 42 it should be noted that the block 13 is formed after the manner of a shuttle, the cam portions indicated by Y and Z of the cam guide 15 being of arcuate form and having a radius of the length of the links 16. While the block 13 is moved in the cam portion indicated by Y the link 16 has only a swinging movement about the pivot 11 so that during the whole time the locking pawl 69 is held in engagement with the pinion 68 and the rack bar 6! is held out of engagement. If then the guide block 1.3 moves out of the cam portion Y passing through the cam portion between the two cam portions Y and Z the link is displaced at the same time during this swinging movement so that the pivot 11 moves into the dotted position. The lever 18 is thereby also moved at the same time into the dotted position so that the locking pawl 69 is brought out of engagement with the pinion 68, while the rack bar 6| is moved upwards towards the pinion. While the guide block 13 is guided in the cam portion Z first to the right and then again to the left, the rack bar 6| remains in engagement with the pinion 68 and is only brought out of engagement when the cam block 13 moves from the cam portion Z to the cam portion Y.

I claim:

1. An automatic mechanism for embroidery machines and the like comprising a card cylinder, needle plates operated by said card cylinder, a frame movement adjusting mechanism, means controlled by said needle plates controlling the operation of said frame movement adjusting mechanism, means for restoring said needle plates, and an oscillating lever actuating said means controlled by said needle plates, said card cylinder and said restoring means.

2. An automatic mechanism for embroidery machines and the like comprising a card cylinder, needle plates operated by said card cylinder, a frame movement adjusting mechanism, means controlled by said needle plates controlling the operation of said frame movement adjusting mechanism, means for restoring said needle plates and an eccentrically operated lever actuating said means controlled by said needle plates, said card cylinder and said restoring means.

3. An automatic mechanism for embroidery machines and the like comprising a card cylinder, n edle plates operated by said card cylinder, a frame movement adjusting mechanism, means controlled by said needle plates controlling the operation of said frame movement adjusting mechanism, means for restoring said needle plates, an oscillating lever actuating said means controlled by said needle plates, said card cylinder and said restoring means and means controlling the throw of said oscillating lever.

4. An automatic mechanism for embroidery machines and the like comprising a card cylinder, needle plates operated by said card cylinder, a frame movement adjusting mechanism, means controlled by said needle plates controlling the operation of said frame movement adjusting mechanism, means for restoring said needle plates, an eccentrically operated oscillating lever actuating said means controlled by said needle plates, said card cylinder and said restoring means and a cam shaped slide controlling the throw of said lever.

5. An automatic mechanism for embroidery machines and the like comprising a card cylinder, needle plates operated by said card cylinder, a frame movement adjusting mechanism, means controlled by said needle plates controlling the operation of said frame movement adjusting mechanism, means for restoring said needle plates, and an oscillating double-armed lever actuating said means controlled by said needle plates, said card cylinder and said restoring means.

6. An automatic mechanism for embroidery machines and the like comprising a card cylinder, needle plates operated by said card cylinder, a frame movement adjusting mechanism, means controlled by said needle plates controlling the operation of said frame movement adjusting mechanism, means for restoring said needle plates and an eccentrically operated double-armed lever actuating said means controlled by said needle plates, said card cylinder and said restoring means.

7. An automatic mechanism for embroidery machines and the like comprising-a card cylinneedle P t perated by said card cylinder,

a frame movement adjusting mechanism, means controlled by said needle plates controlling the operation of said frame movement adjusting mechanism and unitary oscillating means actuating said means controlled by said needle plates 9. An automatic mechanism for embroidery machines and the like comprising a card cylinder, needle plates operated by said card cylinder, a frame movement adjusting mechanism, means controlled by said needle plates controlling the operation of said frame movement adjusting mechanism, an eccentrically operated double armed lever actuating said means controlled by said needle plates and said card cylinder and means controlling the throw of said lever.

10. An automatic mechanism for embroidery machines and the like comprising a card cylinder, needle plates operated by said card cylinder, a frame movement adjusting mechanism, means controlled by said needle plates controlling the operation of said frame movement adjusting mechanism, an eccentrically operated double armed lever actuating said means controlled by said needle plates and said card cylinder and cam means controlling the throw of said lever.

11. An automatic mechanism for embroidery machines and the like comprising a frame, means for adjusting said frame, means for determining the amount of adjustment to be given to said frame and an eccentrically operated lever controlling said means for adjusting said frame and said means for determining the amount of adjustment to be given to said frame.

' 12. An automatic mechanism for embroidery machines and the like comprising a frame, means for adjusting said frame, means for determining the amount of adjustment to be given to said frame, an eccentrically operated lever controlling said means for adjusting said frame and said means for determining the amount of adjustment to be given to said frame and cam means controlling the throw of said lever.

13. An automatic mechanism for embroidery machines and the like comprising a frame, means for adjusting said frame, means for locking said adjusting means, means for determining the amount of adjustment to be given to said frame including a reciprocating carriage and a double-armed eccentrically operated lever controlling said means for adjusting said frame, said means for locking said adjusting means and said reciprocating carriage.

14. An automatic mechanism for embroidery machines and the like comprising a frame, means for. adjusting said frame, means for locking said adjusting means, means for determining the amount of adjustment to be given to said frame including a reciprocating carriage, a doublearmed eccentrically operated lever controlling said means for adjusting said frame, said means for locking said adjusting means and said reciprocating carriage and am means cooperating with said lever controlling the amount of throw of said lever.

15. An automatic mechanism for embroidery machines and the like comprising a card cylinder, needle plates operated by said card cylinder, a frame movement adjusting mechanism, means controlled by said needle plates controlling the operation of said frame movement adjusting mechanism, means for restoring said needle plates, an oscillating lever actuating said means controlled by said needle plates, said card cylinder and said restoring means and means for varying the amount of actuation given by said oscillating lever to said card cylinder.

16. An automatic mechanism for embroidery machines and the like comprising a card cylinder, a spindle for said card cylinder, an eccentrically operated lever moving said card cylinder to and fro, a gear carried by said spindle, an axially movable drive shaft and a gear carried by said drive shaft maintained always in engagement with said gear upon said spindle.

1'7. An automatic mechanism for embroidery machines and the like comprising a card cylinder, a spindle for said card cylinder, an eccentrically operated lever moving said card cylinder to and fro, a gear carried by said spindle, an axially movable drive shaft, a gear carried by said drive shaft maintained always in engagement with said gear upon said spindle, a second gear carried by said drive shaft and a reciprocating rack for driving said second gear.

18. An automatic mechanism for embroidery machines and the like comprising a card cylinder, a spindle for said card cylinder, movable bearings in which said spindle is mounted and eccentric means for varying the position of said card cylinder with respect to said bearings.

19. An automatic mechanism for embroidery machines and the like comprising a card cylinder, a spindle for said card cylinder, movable bearings in which said spindle is mounted, eccentric means for varying the position of said card cylinder with respect to said bearings, a drive shaft, means upon said drive shaft for rotating said cylinder, a gear carried by said drive shaft, means for intermittently operating said drive shaft by said gear and means for locking said drive shaft when said gear is not being operated.

KURT GUSTAV SCHEIBEL. 

